Machine for crushing or grinding



Apr. l0,'l923. 1,451,155

G.H.FRASERV MACHINE FOR CRUSHING OR GRINDING Original Filed Men. 31, 1917 5 sheets-sheet 1 v INVENTOR WITNESSES: 4 660 W fizml mw Apr. 10, 1923.

'G. H. FRASER MACHINE FOR CRUSHING OR GRINDING Original Filed Mar. 31, 1917 C5 sheets-sheet 2 INVE'NTOR I WlTN ESSES':

Apr. 10, 1923.

Original Filed Ma1". 31, 1917 5 sheeps-sheet 3 INVENTOR WITNESSES:

Patented Apr. 10, 1923.

uNrrE MACHINE FOR CBUSHING OR GRINDING.

Application filed March 31, 1917, Serial No. 158,824. Renewed August 15, 1922. Serial No. 582,071.

1 all whom it may concern Be it known that I, GEORGE H. FRASER,

a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State ofNew York, have invented certain new and useful Improvements in Machines for Crushing or Grinding, being a refiling of my application Ser. No. 802,690, filed Nov. 24, 1913, of which the following is a specification. v

This invention relates to machinery :for crushing, grinding or pulverizing materials, and aims to provide certain improvements therein.

The invention .relates more particularly to rock crushers of the type having a plurality of crushing rolls within an annular die, in which the crushing is effected between the periphery of the rolls and the inner face of the die. Examples of this type of crusher are well known in which the die revolves and is held in position yieldingly by the rolls, or rigidly by a support, and the rolls are pressed outwardly by springs to resist a crushing pressure from the inner face of the die, and move approximately radially thereof to yield to adapt themselves to the work. Various means are used for driving one or the other of said parts, and one is usually driven by traction from another.

My present invention aims to provide an improved crusher or pulverizer especially applicable to this general type.

To this end in carrying out my present invention in its preferred form, I provide an improved arrangement of die and rolls, improved means for carrying the rolls, improved means for guiding them, means for transmitting all or part of the crushing thrust from one roll to another, an improved feed for automatically regulating the flow to the crusher, and various details of improvement .in the construction and arrangement of the various parts of the crusher, all of which will be hereinafter more fully set forth with reference to the accompanying drawings, in

Fig. 1 is a front elevation of a pulverizerside thereof;

Fig. '4.- is a vertical axial sectionthereof Referring to the drawings, A is the casing or frame, B is the ring or die, C, C? and C are the crushing rolls, D, D and D are .their shafts or aides, E, E and E are their bearings or carriers, S are the crushing springs, and Z 15 the ad usting screw.

The frame or casing carries the ring and rolls and preferably encloses them. The ring revolves and is supported in any suitable manner, in the construction shown yield.-

ingly by the top roll. Th other rolls press outwardly against the inner face of the ring with a pressure that may be adjusted by the springs or adjusting screw. The ring and rolls are driven in any suitable, manner, as by driving pulley F on the shaft D of the top roll for example, so that the ring will be driven by traction from this roll and the other rolls by traction from the ring.v The feed delivers the rock on tothe inner face of the ring in front of the feed roll C and the crushed rock flows off the sides of the ring and falls through anoutlet-aP in the bottom of the casing. This is the usual operation for machines of this character, and any known construction can be employed for accomplishing it in connection with my invention, whichl willnow describe in dctail in ts preferred form as illustrated in the drawings. v I

According to one feature of improvement the frame or casing A comprises a base a, a full or supporting side I) of greater diameter than the ring and havingroll apertures 0 larger than the rolls and the casing has a portion which projects internally-of and preferably through the interior .of the ring having preferably tubular bearing extensions 2 intermediate of the rolls, and a sec- 0nd wall or small side .6 at the otherside.

and of less diameter tlian the internal diameter of the ring, between which walls is the y a removable supplemental cover 2', having a up wear.

central bore fitting the edge of the wall 6,

and an eccentric edge fitting the shell h, and

a flat bottom resting on the base a, so that the auxiliary cover may be removed to permit removal of the ring.

The shell h is shown as made of three sections clamped to hand-hole castings through which access to the interior may be had externally of the ring, and bolted to liners Z fitting in recessed cross flanges m on the base, see Fig. 5, so that any shell section can be removed or renewed as a wear memher.

The roll apertures c are closed by covers a, and these and the second wall 6 have shaft holes 0 Fig. 4 giving suitable shaft clearance, and on their outer faces they are machined to make suitable contact with dust guards 79 for closing said shaft holes. The

. base, full side and short side, and intermediate extensions, are preferably formed as one integral piece where sectionalism is not required, and constitute a rigid frame for supporting all other parts.

The rolls are movably and rotatably ca ried, preferably by pivotally mounted carriers or bearing members E, E E which are shown as keyed to fulcrum shafts G extending through the interior of the ring and oscillating in the bearings a, each carrier being thus pivoted to swing on an axis preferably parallel with the axis of the ring, and being guided and positioned thereby to permit movement of the roll approximately radially of the ring.

When as shown the ring is supported by the top roll, the upper carriers E are preferably both supported from a rigid part of the frame, and to ensure bearing alignment and equalize load, this support is preferably an equa'lizing or compensating member, and preferably provides for yieldingly or elastically positioning the top roll. As shown, a reacting equalizing bar H is fulcrumed centrally on one of the upper extensions z, and springs I carried by these, support at their ends the opposite top bearings, and are held against undue expansion by a screw J which permits yielding, and permits upward adjustment to allow the roll to rise to take This compensatory means will rock to equalize the load at each side of the roll, and the springwillyieldlto cushion the shocks. Any suitable rocking or yielding provision for accomplishing this purpose may be utilized, but that shown is preferred as it avoids projection of any parts beyond the inner periphery of the ring, so that these do not interfere with the sidewise removal of the ring.

This connection between the opposite bearings positions the top roll and is preferably used for carrying the weight of the parts independently of the means for generating or resisting crushing pressure, but may be adjusted therefor or be supplemental thereto, as by releasing the screw J, so that limitation of the spring action will not exist.

In machines of this character the crush ing pressure has been applied indirectly to. the rolls through the medium of some fixed part against which the pressure resisting means have reacted, so that part of the force of impact incident to crushing has been lost in being transmitted to a fixed or neutral member. One feature of my invention aims to provide for consuming all of the crushing forces, impact, and reaction, within the crushing members, so that all these forces may be utilized for crushing, with the consequent increased'efliciency and avoidance of loss.

To this end my invention provides means for transmitting all the crushing pressure from each roll carrier to the other or others, and for consuming all the forces generated or utilized in crushing within the ring and rolls, independently of whether or not the ring is yieldingly mounted or is the driven member.

This may be accomplished in various ways, but in the type of machine shown I prefer the construction shown in the drawings, in which means are provided between the several rolls for holding or pressing each outwardly to resist a crushing pressure from the inner face of the ring, which means react toward the other or other rolls with a force that is countervailing in two or more directions, so that action and reaction are equalized and consumed between the rolls and ring. Preferably these means are yieldin elastic, movable, flexible, and adjustable,

and are duplicated at each side of the rolls, and preferably those at each side are connected together adjustably, and equalizing means are provided between them for automatically controlling the position or operation of each to equalize their action, so that the pressure at each side of each .roll will be uniform in operation. As shown. an expansively acting compression member is used intermediate, of the roll bearings,

and presses radially outward against eacl'i either directly or divergently at any angle intermediate of the direct and the angle of complete collapse, and a floating connection between these members enables, each to assume an angle of divergence suflicient to balance its action against that of the other.

The expansive member preferably con- 1 sists of a compression member opposite each bearing, and an intermediate transmitting member connecting the inner ends of these, and these four receiving the reaction of each and transmitting it to the others, the parts being movably connected together to swing to.-ada'pt themselves to the various movements of each or equalize the thrusts of the rolls.

The crushing springs S are preferably utilized for these members, and as shown are pivotally connected to the cap is of each bearing. and to a spring carrier 9 which is movable axially of the die to adjust the springs from a position at right angles to the bearings to any desired angularity for operation, or to suflicient angularity to permit the rolls to be moved inwardly until clear of the ring for permitting removal of them or the latter. l/Vhen the springs S are duplicated at each side and act divergently as shown, the carriers 9 through the connecting screw or tension member (Z will float axially to equalize the thrust at each side. When the springs are at right angles, those on each side will equalize the thrusts between themselves independently of those at the other side. When the springs are adjusted to such angularity that their thrusts cease, the rolls can be moved inwardly to clear the ring.

The yield is preferably btained by making the springs part of the divergent thrust members, and in such case I prefer to connect a spring seat 7' to each cap, and a spring screw 8 to each thrust transmitter, and provide an. adjustable nut 25 on this screw, and a limiting nut u thereon for preventing separation of the parts. The pivotal connections between the cap and transmitter are preferably universal joints in all except one direction, so that the parts are free to move to adapt themselves to all varying independent motions of the rolls, or of equalizing, but are arrested by knuckle-stops '0 against movement past the dead center or right angle position. This prevents collapse or displacement in one direction, while permitting desired angularity for divergent equalizing action, and providing for all necessary movements.

The equalizing member or adjusting screw 03 can float and swing to correspond to all the movements of the transmitters g, as it traverses a clearance hole w through each wall I) and e of the casing. and extends through the ring from one side to the other thereof. This hole is closed by plates a: separated by a spring 1 surrounding the rod (Z, which rod should be a tension or compression member according to whether the springs collapse outwardly as shown or otherwise.

Adjusting the screw 01 causes the thrust members to force thev rolls outwardly or draw them together aocordingto the direction of adjustment, and to increase or diminish the crushing pressure according to the extent of adjustment, and when the springs are used as part of these members their clearance is limited to the ordinary ranges required for use, but in case it is necessary to compensate. for wear of. the crushing faces, this may be taken up by adjusting the nuts 6 outwardly on the screws 8 until the desired spring pressure is attained.

The rolls are preferably pivoted at approximately equidistant points, and each is independently movable, and all are movable as a group in the construction shown, so that they constitute a movable element capable of adapting its position to the position of the ring, and adapted to exertits crushing forces thereon independently of the movement of the latter, and without loss of any reaction by reason of their change of position. i

The ring shown is free to move axially relatively to the rolls, and cheek pieces or rings spaced from its sides limit the discharge of material until it is crushed to the.-

size corresponding to the spaces between the ring and cheek pieces. In such mills the position of the ring between the cheek pieces may be determined by proportioning the feed on to each side of the ring, so that it will run free. My invention provides means for adjusting the feed on to each. side of the vring. To accomplish this, preferably a movable or swinging gate K is provided be neath the feed hopper L. which can beset to so proportion the feed between the spouts M that the ring will run free.

To automatically vary this feed adjust-- ment to counteract the tendency of the ring to move out of its track, my invention provides means automatically adjusting this gate and operated bv the sidewise movement of the ring. This is preferably accomplished by an automatic adjuster N, which as shown consists of a lever fulcrumed to the casing and connected to the gate K at its front end, and operated. by the movement of the ring at its rear end, so that as this end of the lever is tilted it will tilt the gate and correspondingly change the pro-.

pieces 0 instead.

uneven side wear is avoided, and waste of power through side rub of the ring against the cheek pieces is prevented.

Another feature of improvement consists in movably mounting the cheek pieces so that they can follow the side movements of the ring and maintain their proximity to it, without unnecessary rubbing. I prefer to accomplish this by making the cheek pieces 0 axially movable and mounting them so that they can slide passively within the casing. As shown, each cheek piece is an endless substantially annular plate having a beveled inner edge adjacent to the ring for directing rock on to the latterand returning uncrushed rock to the ring, an outwardly beveled inner face opposed to the side of the ring, and spaced therefrom to permit only material of the desired fineness to escape, and having externally of the ring supporting'provisions by which it is movably carried from the casing. Preferably each cheek piece has a hole P through which passes a rod Q, which is slidingly supported from the casing, and on which the said cheek pieces are adjustably spaced the desired distan'ce apart by .nuts R, and slidingly mounted and held yieldingly in position against these nuts by springs S so that the cheek pieces with their spacing rods can be adjusted to vary the size of discharge, and can float to follow the side lash of the ring, and can yield against their springs to pass any large piece that may be forced between the ring and cheek piece.

By this arrangement the material can be crushed to pass a certain size before escaping from the machine, thus avoiding the necessity for internal or other screens to size the product. To permit these movements the casing is formed with a. clearance space outwardly of the cheek pieces in which they can travel. [To avoid escape of material through this space the casing is formed with internal flanges T lapping the cheek pieces.

The small side 6 of the casing is of less diameter than the cheek pieces, so that the latter as well as the ring can be removed over this side, and opposite each roll the cheek pieces are recessed to coincide with the roll openings 0, so that a roll may be removed without disturbing a cheek piece. Intermediate of these parts each cheek piece projects inwardly of the ring sufliciently to hold the material thereon, and opposite the feed chutes each cheek piece is recessed to give access to the interior of the ring.

The feed hopper Lhasbifurcated legs straddling the shell h and communicating with the spouts M. Above the gate K it has i a contracted inlet with the usual feed and shut-off gates for adjusting and starting and stopping feed, and above these it has a revolving feeder or roll U which is driven from'the crushing ,roll C and controls feed,

so that its operation is coincident with that of the crushing roll, which is traction-driven and may slip or vary in speed, making it desirable that feed should be controlled from it.

Between the spouts .M, I prefer to use a chute V, which bridges the space between the spouts and directs thedischarge from either on to the ring. This bridge sets removably on internal flanges or walls of the casing, and can be removed through the hole for the spout. The chute, spouts and hopper may be placed at either end of the machine, which may be run in either direction, so as to have the inflowing'rock fall on the descending side of the ring. All of the parts are reversible in similar respects.

My invention provides an improved construction for the crushing rolls, comprising preferably a tapered hub W keyed on the shaft, and having notches in its rim on one side providing radial faces X, and a separate tire Y having a tapered interior fitting the hub and having internal projections Z entering these notches and receiving the retaining bolts a which draw the tire home on the hub and hold it axially thereof. The 111 Z engage the shoulders X to prevent the tire from turning on the hub, and the inner faces of the lugs by contacting with the face of the hub at the bottom of the notches, posi tion the parts axially to insure that the convex exterior of the tire shall be in proper relation to the shaft and ring, so that the concave interior of the latter can track on the roll and run centrally of the crushing chamber.

Each roll shaft is preferably formed with an enlarged center terminating in a shoulder Z) outwardly of the casing and within the dust guard, against which shoulder a sliding thrust collar 0 is pinned on the shaft and acts against an annular thimble seated in the inner side of the bearing, so that the thrust of the shaft is transmitted through the shoulder and collar outwardly against the bearing. The dust guard 72 covers the shaft hole with sufficient lap toprovide for all movements of the roll, and has. a cup-shaped outer end enclosing the thrust collar and opening toward the bearing, from which it receives lubricant.

In operation, with the construction of mill set forth, the ring will be revolved at sulficient speed to cause centrifugal force to hold the rock on its inner face, and the rolls will crush the rock between their faces and the ring, forcing it over the sides of the ring, where it will be arrested by the cheek pieces and returned to the ring, unless it is fine enough to pass between the cheek pieces and the ring. The cheek pieces will yield if necessary, and will float axially to follow the travel of the ring. Their construction will be adjusted to give the desired size of prod not. The speed of feed will be suited to the capacity under given conditions, and then the controller N will be adjusted to hold the divider or gate K inthe position best suited. to malrethe ring run centrally, after which side movements of the ring acting through the controller N will operate the gate to automatically correct ring position.

The rotary feeder U will control feed to correspond with the operation of the feed roll to prevent clogging or over-feeding.

The several rolls will more to equalize the forces reacting outwardly toward them, and vary their positions with variations in work, and the thrust members will adapt themselves to varying conditions to preserve uniformity and equilibrium at each side of the rolls. All forces of action and reaction will be consumed within the ring and rolls and utilized in different directions as crushing forces on the material being operated on.

To remove either roll, the pressure members will be released, the roll carrier swung inwardly until the roll clears the ring, the carrier on the full side of the casing will be disconnected, the corresponding cover, a re moved, and the roll drawn out through the hole 0.

To remove the ring the rolls will be collapsed until clear of it, and the cletachable cover 11 will be withdrawn, .thus permitting the ring and the cheek rings to be slid axially outward until clear of the casing and shafts.

To increase or diminish vcrushing pres sure, the position of the spring carriers will be adjusted axially, or the spring nuts will be adjusted. radially of the ring, or both.

The rolls may be collapsed in the construction shown by adjusting the spring carriers until the thrust members pull the rolls inwardly, but if preferred they may be drawn together by any suitable means, as for ex-- ample by connecting each with the pivotal support of the other, and adjusting it toward this to bring its roll to the desired position either for removal or for changing the ring.

It will be seen that my invention provides improvements which can be variously and advantageously employed,and itwill be understood that the invention is not limited'to the particular details of construction, arrangement or combination of features herein set forth as constituting its preferred form,

since it can be employed in whole or in part without departing from the spirit of the invention, according to such modifications as 1 circumstances of the judgment of those skilled in the art may dictate.

I do not claim herein the improvements in yielding spider mills claimed in my companion application Number 158,825 filed March 21, 1917.

VVhat I claim is 1. In combination, an annular crushing die, revolving in an approximately vertical plane and having an internal vcrushing face, a rotatable crushingroll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, non-rotative means on which said roll is rotatably mounted, and supporting means supporting said die and mounted exteriorly thereof comprising a portion extendingpast one side of said die and a stationary portion extending through the interior of said die and internally supporting the latter and of less size than the internal diameter of said die, said supporting means affording a space at the other side of said die through which the latter may be removed.

2. In combination, an annular crushing die revolving in an approximately vertical plane and having an internalcrushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving: one of said parts, non-rotative means on which said roll is rotatably mounted, and supporting means for said die mounted exterio'rly thereof and comprising a portion extending past one side of said die, a portion extending through and internally supporting said die anda portion opposite the other side of said die of less size than'therinner diameter of said die and affording a space exteriorly of it through which said die may be removed.

3. In combination, an annular crushing die revolving in an approximately vertical alane and havin an internal. crushin face a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal tothe inner face of said die, means for revolving one of said parts,'non-rotative means on which said roll is rotatably mounted, and supporting meansfor said die comprising a portion, externally of and beneath and extending across theouter periphery of saidv die, a portion extending upwardly from said'portion past one side of said die, and a portion extending inwardly from such upwardportion and through the interior of said die andinter 1151' nally supporting the latter, and affordingaround it a space at the other side of said 1,

die through which the latter may be re-' at the other side of said die enclosingthe interior of and-of less diameter than the iao internal diameter of the latter and over which said die can be passed for removal, and means movably connecting said roll to said frame, and means removably supporting said die from said frame, whereby said die can be removed over one side of said frame, and said roll can be removed through the other side thereof.

5. In combination, an annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric to said die and having a crushing face reciprocal to that 0f the latter, means for revolving one of said parts, and a frame comprising an apertured side wall at one side of and affording access within said die and extending past one side of said die and movably supporting said die and supporting said roll, a side wall at the other side of said die enclosing the interior of and of less size than the internal diameter of the latter and over which said die can be passed for removal, and a separable side wall surrounding said latter side wall opposite and enclosing that side of said die and removable to permit removal of said die past said latter side wall.

6. In combination, an annular crushing die revolving in an approximately vertical plane and having an internal crushing face, a rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of saiddie, means for revolving one of said parts, non-rotative means on which said roll is rotatably mounted, and supporting means for said parts comprising an apertured base portion below and extending across the outer periphery of said die and affording a discharge opening below the latter, and a portion extending upwardly from said base portion and past one side of said die and internally supporting said die solely from such side, and a portion extending through the interior of said die and affording around it at the otherside of said die a space through which said die may be removed.

7. In combination, an annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric to said die and having a crushing face reciprocal to that of thelatter, means for revolvmg one of said parts, a base supporting said parts, a wall opposite and enclosing one side ofsaid die having a supporting portion crossing said die and carried by said base, a wall opposite and enclosing the other side of said die, and a rigid support intermediate of said Walls extending through said die for supporting said, roll between said walls.

8. In combination, an internally supported annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric to a movably and revolubly supporting saiddie and having a crush ing face reciprocal to that of the latter, means for revolving one of said parts, a frame carrying said parts and having a fixed pivotal provision extending through said die, and a non-rotative swinging carrier for said roll pivotally mounted on said provision.

9. In combination, a traction driven revolving annular crushing die having an internal crushing face, a rotatable crushing roll within and eccentric to said die and having a crushing face reciprocal to that of the latter, means for revolving one of said parts, a frame supporting said parts and having a rigid sustaining provision extending through said die, and a non rotative movable carrier for said roll movably mounted on said provision and sustaining said roll and die from said frame.

10. In combination, an annular internally supported crushing die revolving in an approximately vertical plane and having an internal crushing face, a movable and rotatable crushing roll within and eccentric to and supporting said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, non-rotative movable means on Which said roll is rotatably mounted, supporting means mounted exteriorly of said die and having a portion extending past one side of said die on which said non-rotative means are movably mounted, outwardly acting holding means disposed at the other side of said die opposite and acting outwardly against said non-rotative means to hold said roll outwardly toward the inner face of said die and sustained through said die from said supporting means at the other side of said die, and an internal sustaining means within said die sustaining said holding means from said portion through the interior of said die.

11. In combination, an internally supported annular crushing die revolving in an approximately vertical plane and having an internal crushing face, a movable and rotatable crushing roll Within and eccentric to and supporting said die and having a peripheral. crushing face reciprocal to the inner face of said die, means for revolving one of said parts, non-rotative movable means on which said roll is rotatably mounted,means for supporting said parts, axially inwardly inclined holding means disposed inwardly of the axis of said roll and opposite and act ing radially outwardly against said non-rotativemeans to hold said roll outwardly toward the inner face of said die to resist a crushing pressure therefrom, and transversely movable sustaining means movable transversely of the direction of stress of and sustainino; said holding means,

12. In combination, an annular crushing die having an internal crushing face, a movface of said die, means for revolving one of said parts, means for supporting said parts, non-rotative movable means on which said roll is rotatably mounted, and axially inwardly inclined holding means disposed at each side of said roll inwardly of its axis and opposite and acting radially outwardly against said non-rotative means to hold said roll outwardly toward the inner face of said die to resist a crushing pressure therefrom, and axially movable sustaining positive spacing means for said holding means re spectively movable transversely thereof to vary their inclination.

13. In combination, an internally supported crushing die revolving in an approxi mately vertical plane and having an internal crushing face, a movable and rotatable crushing roll within and eccentric of said die and having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, means for supporting said parts, movable non-ro tative means on which said roll is rotatably mounted, radially outwardly acting holding means inwardly of the axis of said roll disposed at each side ofsaid roll opposite and acting outwardly against .said non-rotative means at each side of said roll, and transversely adjustable sustaining positive spacing means connected through the interior of said die and sustaining said holding means and adjustable transversely of the direction of stress thereof for adjusting them.

14. In combination, an internally supported annular crushing die revolving in an approximately vertical plane and having an internal crushing face, two movable and rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner face of said die, means for revolving one of said parts, means'for supporting said parts, nonrotative movable carriers on which said rolls are rotatably mounted respectively, and axially inwardly inclined holding means disposed inwardly of theaxes of said rolls and opposite and acting outwardly against said non-rotative means respectively to hold said rolls outwardly away from one another to resist a crushing pressure from the inner face of said die, and. transversely adjustable means intermediate of two of said holding means and adjustable transversely of their direction of stress for adjusting them.

15. In combination, an internally supported annular crushing die having an internal crushing face, three movable and rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner face of said die, means-for revolving one of said parts, means" for supporting saidparts,v

non-rotative movable means on which said rdlls are rotatably mounted respectively,

axially inwardly inclined holding means disposed inwardly ofthe axes of said rolls and opposite and acting radially outwardly against said nonuotative means respectively for holding said rolls outwardly toward the inner face of said die to resist a crushing pressure therefrom, and sustaining positive spacing meansintermediate of and sustaining said holding means from one another. j y

16. In combination, an internally supported annular crushing die having an internal crushing face, three movable and rotatable crushing rolls within and eccentric of said die and each having a peripheral crushing face reciprocal to the inner faceof said di'e, means for revolving one of said parts, means for supporting said parts, non-rotative movable means on which'said rolls are rotatably mounted respectively, oppositely axially inwardly inclined holding means at each side of said rolls and inwardly of their axes opposite and acting radially outwardly against said non-rotative means respectively to hold said rolls outwardlytowardthe inner .face of said die to resist a crushing pressure therefrom, and axially movable positively spacing means connected through said die and spacing said holding means at each side thereof. I

1". In combination, an annular crushing die having an internal crushing face, two or more movable and rotatable crushing rolls within and eccentric to said die and each having a crushing face reciprocal tothat of the latter, means for revolving one of said parts, movable carriers on which said rolls are rotatably mounted respectively, and means'for holding said rolls outwardly to resist a crushing pressure from the inner face of said die, comprising thrust members intermediate of said carriers and adapted to react there against approximately radially of said rolls, and a movable tension member intermediate of and resisting the action of said thrust members.

18. In combination, a revolving annular die having an internal crushing face,'two or more movable and rotatable crushing rolls within and eccentric to said die and each having a crushing face reciprocal to that of the latter, means for revolving one of said parts, means supporting said parts, movable carriers on which said rolls are rotatably mounted respectively, means for holding said rolls outwardly toresist a crushing pressure from the inner face of said die, comprising compression members inwardly of and pivotally engaging said carriers and inclined axially thereof, and a movable member intermediate of and pivotally engaging said compression members for transmitting the thrust of each to the others with a force that is countervailing in two or more directions. 1 I

19. In combination, an annular traction driven crushing die having an internal crushing face, a movable and rotatable crushing roll within and eccentric to said die and having a. crushing face reciprocal to that of the latter, means for revolving one of said parts, means supporting said parts, a movable carrier on which said roll is rotatably mounted, a compression member inwardly of the axis of said roll and pivo ally engaging said carrier to hold said roll outwardly to resist a crushing pressure from the inner face of said die, an adjust able member pivotally engaging said compression member and receiving the reaction thereof, means for adjusting said adjustable member, and means for limiting such adjustment to limit pivotal movement of said members.

520. In combination, an annular crushing die having an internal crushing face, a plurality of movable and rotatable crushing rolls within and eccentric to said die and each having a crushing face reciprocal to that of the latter, means for revolving one of said parts, means supporting said parts, movable carriers on which said rolls are rotatably mounted respectively, outwardly collapsible means acting against said carriers at an in clination for holding said rolls apart to resist a crushing pressure from the inner face of said die,- and means for moving said rolls inwardly to retire them from said die for permitting removal, of said die and rolls.

21. In combination, a revolving annular crushing die having: an internalcrushing face and movable axially, a rotatable crushing' roll within and eccentric to said die and having a crushing face reciprocal to that of the latter, means for revolving one of said parts, n'ieans supporting said parts, means for adjusting the axial position of said (lie comprising means for feeding material to be crushed on to the inner face of saiddie from both sides thereof, and means operated by the axial movementof the die for adjusting the feed to either side thereof.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses. Y

' GEORGE H. FRASllll i.

Witnesses CHAS. E. lONNELLY, ANToNio BUONO.

fi l 

